1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2015-2020 Beijing WangXun Technology Co., Ltd.
3 * Copyright(c) 2010-2017 Intel Corporation
4 */
5
6 #include "txgbe_mbx.h"
7 #include "txgbe_vf.h"
8
9 /**
10 * txgbe_init_ops_vf - Initialize the pointers for vf
11 * @hw: pointer to hardware structure
12 *
13 * This will assign function pointers, adapter-specific functions can
14 * override the assignment of generic function pointers by assigning
15 * their own adapter-specific function pointers.
16 * Does not touch the hardware.
17 **/
txgbe_init_ops_vf(struct txgbe_hw * hw)18 s32 txgbe_init_ops_vf(struct txgbe_hw *hw)
19 {
20 struct txgbe_mac_info *mac = &hw->mac;
21 struct txgbe_mbx_info *mbx = &hw->mbx;
22
23 /* MAC */
24 mac->reset_hw = txgbe_reset_hw_vf;
25 mac->start_hw = txgbe_start_hw_vf;
26 /* Cannot clear stats on VF */
27 mac->get_mac_addr = txgbe_get_mac_addr_vf;
28 mac->stop_hw = txgbe_stop_hw_vf;
29 mac->negotiate_api_version = txgbevf_negotiate_api_version;
30 mac->update_mc_addr_list = txgbe_update_mc_addr_list_vf;
31
32 /* Link */
33 mac->check_link = txgbe_check_mac_link_vf;
34
35 /* RAR, Multicast, VLAN */
36 mac->set_rar = txgbe_set_rar_vf;
37 mac->set_uc_addr = txgbevf_set_uc_addr_vf;
38 mac->update_xcast_mode = txgbevf_update_xcast_mode;
39 mac->set_vfta = txgbe_set_vfta_vf;
40 mac->set_rlpml = txgbevf_rlpml_set_vf;
41
42 mac->max_tx_queues = 1;
43 mac->max_rx_queues = 1;
44
45 mbx->init_params = txgbe_init_mbx_params_vf;
46 mbx->read = txgbe_read_mbx_vf;
47 mbx->write = txgbe_write_mbx_vf;
48 mbx->read_posted = txgbe_read_posted_mbx;
49 mbx->write_posted = txgbe_write_posted_mbx;
50 mbx->check_for_msg = txgbe_check_for_msg_vf;
51 mbx->check_for_ack = txgbe_check_for_ack_vf;
52 mbx->check_for_rst = txgbe_check_for_rst_vf;
53
54 return 0;
55 }
56
57 /* txgbe_virt_clr_reg - Set register to default (power on) state.
58 * @hw: pointer to hardware structure
59 */
txgbe_virt_clr_reg(struct txgbe_hw * hw)60 static void txgbe_virt_clr_reg(struct txgbe_hw *hw)
61 {
62 int i;
63 u32 vfsrrctl;
64
65 /* default values (BUF_SIZE = 2048, HDR_SIZE = 256) */
66 vfsrrctl = TXGBE_RXCFG_HDRLEN(TXGBE_RX_HDR_SIZE);
67 vfsrrctl |= TXGBE_RXCFG_PKTLEN(TXGBE_RX_BUF_SIZE);
68
69 for (i = 0; i < 8; i++) {
70 wr32m(hw, TXGBE_RXCFG(i),
71 (TXGBE_RXCFG_HDRLEN_MASK | TXGBE_RXCFG_PKTLEN_MASK),
72 vfsrrctl);
73 }
74
75 txgbe_flush(hw);
76 }
77
78 /**
79 * txgbe_start_hw_vf - Prepare hardware for Tx/Rx
80 * @hw: pointer to hardware structure
81 *
82 * Starts the hardware by filling the bus info structure and media type, clears
83 * all on chip counters, initializes receive address registers, multicast
84 * table, VLAN filter table, calls routine to set up link and flow control
85 * settings, and leaves transmit and receive units disabled and uninitialized
86 **/
txgbe_start_hw_vf(struct txgbe_hw * hw)87 s32 txgbe_start_hw_vf(struct txgbe_hw *hw)
88 {
89 /* Clear adapter stopped flag */
90 hw->adapter_stopped = false;
91
92 return 0;
93 }
94
95 /**
96 * txgbe_reset_hw_vf - Performs hardware reset
97 * @hw: pointer to hardware structure
98 *
99 * Resets the hardware by resetting the transmit and receive units, masks and
100 * clears all interrupts.
101 **/
txgbe_reset_hw_vf(struct txgbe_hw * hw)102 s32 txgbe_reset_hw_vf(struct txgbe_hw *hw)
103 {
104 struct txgbe_mbx_info *mbx = &hw->mbx;
105 u32 timeout = TXGBE_VF_INIT_TIMEOUT;
106 s32 ret_val = TXGBE_ERR_INVALID_MAC_ADDR;
107 u32 msgbuf[TXGBE_VF_PERMADDR_MSG_LEN];
108 u8 *addr = (u8 *)(&msgbuf[1]);
109
110 /* Call adapter stop to disable tx/rx and clear interrupts */
111 hw->mac.stop_hw(hw);
112
113 /* reset the api version */
114 hw->api_version = txgbe_mbox_api_10;
115
116 /* backup msix vectors */
117 mbx->timeout = TXGBE_VF_MBX_INIT_TIMEOUT;
118 msgbuf[0] = TXGBE_VF_BACKUP;
119 mbx->write_posted(hw, msgbuf, 1, 0);
120 msec_delay(10);
121
122 DEBUGOUT("Issuing a function level reset to MAC");
123 wr32(hw, TXGBE_VFRST, TXGBE_VFRST_SET);
124 txgbe_flush(hw);
125 msec_delay(50);
126
127 hw->offset_loaded = 1;
128
129 /* we cannot reset while the RSTI / RSTD bits are asserted */
130 while (!mbx->check_for_rst(hw, 0) && timeout) {
131 timeout--;
132 /* if it doesn't work, try in 1 ms */
133 usec_delay(5);
134 }
135
136 if (!timeout)
137 return TXGBE_ERR_RESET_FAILED;
138
139 /* Reset VF registers to initial values */
140 txgbe_virt_clr_reg(hw);
141
142 /* mailbox timeout can now become active */
143 mbx->timeout = TXGBE_VF_MBX_INIT_TIMEOUT;
144
145 msgbuf[0] = TXGBE_VF_RESET;
146 mbx->write_posted(hw, msgbuf, 1, 0);
147
148 msec_delay(10);
149
150 /*
151 * set our "perm_addr" based on info provided by PF
152 * also set up the mc_filter_type which is piggy backed
153 * on the mac address in word 3
154 */
155 ret_val = mbx->read_posted(hw, msgbuf,
156 TXGBE_VF_PERMADDR_MSG_LEN, 0);
157 if (ret_val)
158 return ret_val;
159
160 if (msgbuf[0] != (TXGBE_VF_RESET | TXGBE_VT_MSGTYPE_ACK) &&
161 msgbuf[0] != (TXGBE_VF_RESET | TXGBE_VT_MSGTYPE_NACK))
162 return TXGBE_ERR_INVALID_MAC_ADDR;
163
164 if (msgbuf[0] == (TXGBE_VF_RESET | TXGBE_VT_MSGTYPE_ACK))
165 memcpy(hw->mac.perm_addr, addr, ETH_ADDR_LEN);
166
167 hw->mac.mc_filter_type = msgbuf[TXGBE_VF_MC_TYPE_WORD];
168
169 return ret_val;
170 }
171
172 /**
173 * txgbe_stop_hw_vf - Generic stop Tx/Rx units
174 * @hw: pointer to hardware structure
175 *
176 * Sets the adapter_stopped flag within txgbe_hw struct. Clears interrupts,
177 * disables transmit and receive units. The adapter_stopped flag is used by
178 * the shared code and drivers to determine if the adapter is in a stopped
179 * state and should not touch the hardware.
180 **/
txgbe_stop_hw_vf(struct txgbe_hw * hw)181 s32 txgbe_stop_hw_vf(struct txgbe_hw *hw)
182 {
183 u16 i;
184
185 /*
186 * Set the adapter_stopped flag so other driver functions stop touching
187 * the hardware
188 */
189 hw->adapter_stopped = true;
190
191 /* Clear interrupt mask to stop from interrupts being generated */
192 wr32(hw, TXGBE_VFIMC, TXGBE_VFIMC_MASK);
193
194 /* Clear any pending interrupts, flush previous writes */
195 wr32(hw, TXGBE_VFICR, TXGBE_VFICR_MASK);
196
197 /* Disable the transmit unit. Each queue must be disabled. */
198 for (i = 0; i < hw->mac.max_tx_queues; i++)
199 wr32(hw, TXGBE_TXCFG(i), TXGBE_TXCFG_FLUSH);
200
201 /* Disable the receive unit by stopping each queue */
202 for (i = 0; i < hw->mac.max_rx_queues; i++)
203 wr32m(hw, TXGBE_RXCFG(i), TXGBE_RXCFG_ENA, 0);
204
205 /* Clear packet split and pool config */
206 wr32(hw, TXGBE_VFPLCFG, 0);
207 hw->rx_loaded = 1;
208
209 /* flush all queues disables */
210 txgbe_flush(hw);
211 msec_delay(2);
212
213 return 0;
214 }
215
216 /**
217 * txgbe_mta_vector - Determines bit-vector in multicast table to set
218 * @hw: pointer to hardware structure
219 * @mc_addr: the multicast address
220 **/
txgbe_mta_vector(struct txgbe_hw * hw,u8 * mc_addr)221 STATIC s32 txgbe_mta_vector(struct txgbe_hw *hw, u8 *mc_addr)
222 {
223 u32 vector = 0;
224
225 switch (hw->mac.mc_filter_type) {
226 case 0: /* use bits [47:36] of the address */
227 vector = ((mc_addr[4] >> 4) | (((u16)mc_addr[5]) << 4));
228 break;
229 case 1: /* use bits [46:35] of the address */
230 vector = ((mc_addr[4] >> 3) | (((u16)mc_addr[5]) << 5));
231 break;
232 case 2: /* use bits [45:34] of the address */
233 vector = ((mc_addr[4] >> 2) | (((u16)mc_addr[5]) << 6));
234 break;
235 case 3: /* use bits [43:32] of the address */
236 vector = ((mc_addr[4]) | (((u16)mc_addr[5]) << 8));
237 break;
238 default: /* Invalid mc_filter_type */
239 DEBUGOUT("MC filter type param set incorrectly");
240 ASSERT(0);
241 break;
242 }
243
244 /* vector can only be 12-bits or boundary will be exceeded */
245 vector &= 0xFFF;
246 return vector;
247 }
248
txgbevf_write_msg_read_ack(struct txgbe_hw * hw,u32 * msg,u32 * retmsg,u16 size)249 STATIC s32 txgbevf_write_msg_read_ack(struct txgbe_hw *hw, u32 *msg,
250 u32 *retmsg, u16 size)
251 {
252 struct txgbe_mbx_info *mbx = &hw->mbx;
253 s32 retval = mbx->write_posted(hw, msg, size, 0);
254
255 if (retval)
256 return retval;
257
258 return mbx->read_posted(hw, retmsg, size, 0);
259 }
260
261 /**
262 * txgbe_set_rar_vf - set device MAC address
263 * @hw: pointer to hardware structure
264 * @index: Receive address register to write
265 * @addr: Address to put into receive address register
266 * @vmdq: VMDq "set" or "pool" index
267 * @enable_addr: set flag that address is active
268 **/
txgbe_set_rar_vf(struct txgbe_hw * hw,u32 index,u8 * addr,u32 vmdq,u32 enable_addr)269 s32 txgbe_set_rar_vf(struct txgbe_hw *hw, u32 index, u8 *addr, u32 vmdq,
270 u32 enable_addr)
271 {
272 u32 msgbuf[3];
273 u8 *msg_addr = (u8 *)(&msgbuf[1]);
274 s32 ret_val;
275 UNREFERENCED_PARAMETER(vmdq, enable_addr, index);
276
277 memset(msgbuf, 0, 12);
278 msgbuf[0] = TXGBE_VF_SET_MAC_ADDR;
279 memcpy(msg_addr, addr, 6);
280 ret_val = txgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 3);
281
282 msgbuf[0] &= ~TXGBE_VT_MSGTYPE_CTS;
283
284 /* if nacked the address was rejected, use "perm_addr" */
285 if (!ret_val &&
286 (msgbuf[0] == (TXGBE_VF_SET_MAC_ADDR | TXGBE_VT_MSGTYPE_NACK))) {
287 txgbe_get_mac_addr_vf(hw, hw->mac.addr);
288 return TXGBE_ERR_MBX;
289 }
290
291 return ret_val;
292 }
293
294 /**
295 * txgbe_update_mc_addr_list_vf - Update Multicast addresses
296 * @hw: pointer to the HW structure
297 * @mc_addr_list: array of multicast addresses to program
298 * @mc_addr_count: number of multicast addresses to program
299 * @next: caller supplied function to return next address in list
300 * @clear: unused
301 *
302 * Updates the Multicast Table Array.
303 **/
txgbe_update_mc_addr_list_vf(struct txgbe_hw * hw,u8 * mc_addr_list,u32 mc_addr_count,txgbe_mc_addr_itr next,bool clear)304 s32 txgbe_update_mc_addr_list_vf(struct txgbe_hw *hw, u8 *mc_addr_list,
305 u32 mc_addr_count, txgbe_mc_addr_itr next,
306 bool clear)
307 {
308 struct txgbe_mbx_info *mbx = &hw->mbx;
309 u32 msgbuf[TXGBE_P2VMBX_SIZE];
310 u16 *vector_list = (u16 *)&msgbuf[1];
311 u32 vector;
312 u32 cnt, i;
313 u32 vmdq;
314
315 UNREFERENCED_PARAMETER(clear);
316
317 /* Each entry in the list uses 1 16 bit word. We have 30
318 * 16 bit words available in our HW msg buffer (minus 1 for the
319 * msg type). That's 30 hash values if we pack 'em right. If
320 * there are more than 30 MC addresses to add then punt the
321 * extras for now and then add code to handle more than 30 later.
322 * It would be unusual for a server to request that many multi-cast
323 * addresses except for in large enterprise network environments.
324 */
325
326 DEBUGOUT("MC Addr Count = %d", mc_addr_count);
327
328 cnt = (mc_addr_count > 30) ? 30 : mc_addr_count;
329 msgbuf[0] = TXGBE_VF_SET_MULTICAST;
330 msgbuf[0] |= cnt << TXGBE_VT_MSGINFO_SHIFT;
331
332 for (i = 0; i < cnt; i++) {
333 vector = txgbe_mta_vector(hw, next(hw, &mc_addr_list, &vmdq));
334 DEBUGOUT("Hash value = 0x%03X", vector);
335 vector_list[i] = (u16)vector;
336 }
337
338 return mbx->write_posted(hw, msgbuf, TXGBE_P2VMBX_SIZE, 0);
339 }
340
341 /**
342 * txgbevf_update_xcast_mode - Update Multicast mode
343 * @hw: pointer to the HW structure
344 * @xcast_mode: new multicast mode
345 *
346 * Updates the Multicast Mode of VF.
347 **/
txgbevf_update_xcast_mode(struct txgbe_hw * hw,int xcast_mode)348 s32 txgbevf_update_xcast_mode(struct txgbe_hw *hw, int xcast_mode)
349 {
350 u32 msgbuf[2];
351 s32 err;
352
353 switch (hw->api_version) {
354 case txgbe_mbox_api_12:
355 /* New modes were introduced in 1.3 version */
356 if (xcast_mode > TXGBEVF_XCAST_MODE_ALLMULTI)
357 return TXGBE_ERR_FEATURE_NOT_SUPPORTED;
358 /* Fall through */
359 case txgbe_mbox_api_13:
360 break;
361 default:
362 return TXGBE_ERR_FEATURE_NOT_SUPPORTED;
363 }
364
365 msgbuf[0] = TXGBE_VF_UPDATE_XCAST_MODE;
366 msgbuf[1] = xcast_mode;
367
368 err = txgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 2);
369 if (err)
370 return err;
371
372 msgbuf[0] &= ~TXGBE_VT_MSGTYPE_CTS;
373 if (msgbuf[0] == (TXGBE_VF_UPDATE_XCAST_MODE | TXGBE_VT_MSGTYPE_NACK))
374 return TXGBE_ERR_FEATURE_NOT_SUPPORTED;
375 return 0;
376 }
377
378 /**
379 * txgbe_set_vfta_vf - Set/Unset vlan filter table address
380 * @hw: pointer to the HW structure
381 * @vlan: 12 bit VLAN ID
382 * @vind: unused by VF drivers
383 * @vlan_on: if true then set bit, else clear bit
384 * @vlvf_bypass: boolean flag indicating updating default pool is okay
385 *
386 * Turn on/off specified VLAN in the VLAN filter table.
387 **/
txgbe_set_vfta_vf(struct txgbe_hw * hw,u32 vlan,u32 vind,bool vlan_on,bool vlvf_bypass)388 s32 txgbe_set_vfta_vf(struct txgbe_hw *hw, u32 vlan, u32 vind,
389 bool vlan_on, bool vlvf_bypass)
390 {
391 u32 msgbuf[2];
392 s32 ret_val;
393 UNREFERENCED_PARAMETER(vind, vlvf_bypass);
394
395 msgbuf[0] = TXGBE_VF_SET_VLAN;
396 msgbuf[1] = vlan;
397 /* Setting the 8 bit field MSG INFO to TRUE indicates "add" */
398 msgbuf[0] |= vlan_on << TXGBE_VT_MSGINFO_SHIFT;
399
400 ret_val = txgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 2);
401 if (!ret_val && (msgbuf[0] & TXGBE_VT_MSGTYPE_ACK))
402 return 0;
403
404 return ret_val | (msgbuf[0] & TXGBE_VT_MSGTYPE_NACK);
405 }
406
407 /**
408 * txgbe_get_mac_addr_vf - Read device MAC address
409 * @hw: pointer to the HW structure
410 * @mac_addr: the MAC address
411 **/
txgbe_get_mac_addr_vf(struct txgbe_hw * hw,u8 * mac_addr)412 s32 txgbe_get_mac_addr_vf(struct txgbe_hw *hw, u8 *mac_addr)
413 {
414 int i;
415
416 for (i = 0; i < ETH_ADDR_LEN; i++)
417 mac_addr[i] = hw->mac.perm_addr[i];
418
419 return 0;
420 }
421
txgbevf_set_uc_addr_vf(struct txgbe_hw * hw,u32 index,u8 * addr)422 s32 txgbevf_set_uc_addr_vf(struct txgbe_hw *hw, u32 index, u8 *addr)
423 {
424 u32 msgbuf[3], msgbuf_chk;
425 u8 *msg_addr = (u8 *)(&msgbuf[1]);
426 s32 ret_val;
427
428 memset(msgbuf, 0, sizeof(msgbuf));
429 /*
430 * If index is one then this is the start of a new list and needs
431 * indication to the PF so it can do it's own list management.
432 * If it is zero then that tells the PF to just clear all of
433 * this VF's macvlans and there is no new list.
434 */
435 msgbuf[0] |= index << TXGBE_VT_MSGINFO_SHIFT;
436 msgbuf[0] |= TXGBE_VF_SET_MACVLAN;
437 msgbuf_chk = msgbuf[0];
438 if (addr)
439 memcpy(msg_addr, addr, 6);
440
441 ret_val = txgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 3);
442 if (!ret_val) {
443 msgbuf[0] &= ~TXGBE_VT_MSGTYPE_CTS;
444
445 if (msgbuf[0] == (msgbuf_chk | TXGBE_VT_MSGTYPE_NACK))
446 return TXGBE_ERR_OUT_OF_MEM;
447 }
448
449 return ret_val;
450 }
451
452 /**
453 * txgbe_check_mac_link_vf - Get link/speed status
454 * @hw: pointer to hardware structure
455 * @speed: pointer to link speed
456 * @link_up: true is link is up, false otherwise
457 * @autoneg_wait_to_complete: true when waiting for completion is needed
458 *
459 * Reads the links register to determine if link is up and the current speed
460 **/
txgbe_check_mac_link_vf(struct txgbe_hw * hw,u32 * speed,bool * link_up,bool wait_to_complete)461 s32 txgbe_check_mac_link_vf(struct txgbe_hw *hw, u32 *speed,
462 bool *link_up, bool wait_to_complete)
463 {
464 /**
465 * for a quick link status checking, wait_to_compelet == 0,
466 * skip PF link status checking
467 */
468 bool no_pflink_check = wait_to_complete == 0;
469 struct txgbe_mbx_info *mbx = &hw->mbx;
470 struct txgbe_mac_info *mac = &hw->mac;
471 s32 ret_val = 0;
472 u32 links_reg;
473 u32 in_msg = 0;
474
475 /* If we were hit with a reset drop the link */
476 if (!mbx->check_for_rst(hw, 0) || !mbx->timeout)
477 mac->get_link_status = true;
478
479 if (!mac->get_link_status)
480 goto out;
481
482 /* if link status is down no point in checking to see if pf is up */
483 links_reg = rd32(hw, TXGBE_VFSTATUS);
484 if (!(links_reg & TXGBE_VFSTATUS_UP))
485 goto out;
486
487 /* for SFP+ modules and DA cables it can take up to 500usecs
488 * before the link status is correct
489 */
490 if (mac->type == txgbe_mac_raptor_vf && wait_to_complete) {
491 if (po32m(hw, TXGBE_VFSTATUS, TXGBE_VFSTATUS_UP,
492 0, NULL, 5, 100))
493 goto out;
494 }
495
496 switch (links_reg & TXGBE_VFSTATUS_BW_MASK) {
497 case TXGBE_VFSTATUS_BW_10G:
498 *speed = TXGBE_LINK_SPEED_10GB_FULL;
499 break;
500 case TXGBE_VFSTATUS_BW_1G:
501 *speed = TXGBE_LINK_SPEED_1GB_FULL;
502 break;
503 case TXGBE_VFSTATUS_BW_100M:
504 *speed = TXGBE_LINK_SPEED_100M_FULL;
505 break;
506 default:
507 *speed = TXGBE_LINK_SPEED_UNKNOWN;
508 }
509
510 if (no_pflink_check) {
511 if (*speed == TXGBE_LINK_SPEED_UNKNOWN)
512 mac->get_link_status = true;
513 else
514 mac->get_link_status = false;
515
516 goto out;
517 }
518
519 /* if the read failed it could just be a mailbox collision, best wait
520 * until we are called again and don't report an error
521 */
522 if (mbx->read(hw, &in_msg, 1, 0))
523 goto out;
524
525 if (!(in_msg & TXGBE_VT_MSGTYPE_CTS)) {
526 /* msg is not CTS and is NACK we must have lost CTS status */
527 if (in_msg & TXGBE_VT_MSGTYPE_NACK)
528 ret_val = -1;
529 goto out;
530 }
531
532 /* the pf is talking, if we timed out in the past we reinit */
533 if (!mbx->timeout) {
534 ret_val = -1;
535 goto out;
536 }
537
538 /* if we passed all the tests above then the link is up and we no
539 * longer need to check for link
540 */
541 mac->get_link_status = false;
542
543 out:
544 *link_up = !mac->get_link_status;
545 return ret_val;
546 }
547
548 /**
549 * txgbevf_rlpml_set_vf - Set the maximum receive packet length
550 * @hw: pointer to the HW structure
551 * @max_size: value to assign to max frame size
552 **/
txgbevf_rlpml_set_vf(struct txgbe_hw * hw,u16 max_size)553 s32 txgbevf_rlpml_set_vf(struct txgbe_hw *hw, u16 max_size)
554 {
555 u32 msgbuf[2];
556 s32 retval;
557
558 msgbuf[0] = TXGBE_VF_SET_LPE;
559 msgbuf[1] = max_size;
560
561 retval = txgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, 2);
562 if (retval)
563 return retval;
564 if ((msgbuf[0] & TXGBE_VF_SET_LPE) &&
565 (msgbuf[0] & TXGBE_VT_MSGTYPE_NACK))
566 return TXGBE_ERR_MBX;
567
568 return 0;
569 }
570
571 /**
572 * txgbevf_negotiate_api_version - Negotiate supported API version
573 * @hw: pointer to the HW structure
574 * @api: integer containing requested API version
575 **/
txgbevf_negotiate_api_version(struct txgbe_hw * hw,int api)576 int txgbevf_negotiate_api_version(struct txgbe_hw *hw, int api)
577 {
578 int err;
579 u32 msg[3];
580
581 /* Negotiate the mailbox API version */
582 msg[0] = TXGBE_VF_API_NEGOTIATE;
583 msg[1] = api;
584 msg[2] = 0;
585
586 err = txgbevf_write_msg_read_ack(hw, msg, msg, 3);
587 if (!err) {
588 msg[0] &= ~TXGBE_VT_MSGTYPE_CTS;
589
590 /* Store value and return 0 on success */
591 if (msg[0] == (TXGBE_VF_API_NEGOTIATE | TXGBE_VT_MSGTYPE_ACK)) {
592 hw->api_version = api;
593 return 0;
594 }
595
596 err = TXGBE_ERR_INVALID_ARGUMENT;
597 }
598
599 return err;
600 }
601
txgbevf_get_queues(struct txgbe_hw * hw,unsigned int * num_tcs,unsigned int * default_tc)602 int txgbevf_get_queues(struct txgbe_hw *hw, unsigned int *num_tcs,
603 unsigned int *default_tc)
604 {
605 int err, i;
606 u32 msg[5];
607
608 /* do nothing if API doesn't support txgbevf_get_queues */
609 switch (hw->api_version) {
610 case txgbe_mbox_api_11:
611 case txgbe_mbox_api_12:
612 case txgbe_mbox_api_13:
613 break;
614 default:
615 return 0;
616 }
617
618 /* Fetch queue configuration from the PF */
619 msg[0] = TXGBE_VF_GET_QUEUES;
620 for (i = 1; i < 5; i++)
621 msg[i] = 0;
622
623 err = txgbevf_write_msg_read_ack(hw, msg, msg, 5);
624 if (!err) {
625 msg[0] &= ~TXGBE_VT_MSGTYPE_CTS;
626
627 /*
628 * if we didn't get an ACK there must have been
629 * some sort of mailbox error so we should treat it
630 * as such
631 */
632 if (msg[0] != (TXGBE_VF_GET_QUEUES | TXGBE_VT_MSGTYPE_ACK))
633 return TXGBE_ERR_MBX;
634
635 /* record and validate values from message */
636 hw->mac.max_tx_queues = msg[TXGBE_VF_TX_QUEUES];
637 if (hw->mac.max_tx_queues == 0 ||
638 hw->mac.max_tx_queues > TXGBE_VF_MAX_TX_QUEUES)
639 hw->mac.max_tx_queues = TXGBE_VF_MAX_TX_QUEUES;
640
641 hw->mac.max_rx_queues = msg[TXGBE_VF_RX_QUEUES];
642 if (hw->mac.max_rx_queues == 0 ||
643 hw->mac.max_rx_queues > TXGBE_VF_MAX_RX_QUEUES)
644 hw->mac.max_rx_queues = TXGBE_VF_MAX_RX_QUEUES;
645
646 *num_tcs = msg[TXGBE_VF_TRANS_VLAN];
647 /* in case of unknown state assume we cannot tag frames */
648 if (*num_tcs > hw->mac.max_rx_queues)
649 *num_tcs = 1;
650
651 *default_tc = msg[TXGBE_VF_DEF_QUEUE];
652 /* default to queue 0 on out-of-bounds queue number */
653 if (*default_tc >= hw->mac.max_tx_queues)
654 *default_tc = 0;
655 }
656
657 return err;
658 }
659